<template>
  <div id="container">
    <div id="left">
         <router-link to="/child0">Home</router-link> |
    </div>
    <div id="right">
          <router-view></router-view>

    </div>
  </div>
</template>

<style >
   * {
     margin: 0;
     padding: 0;
   }
  #container {
    height: 100vh;
    display: flex;
  }
  #left {
    background: lightblue;
    width: 100px;
  }
  #right {
    background: lightcyan;
    flex: 1;
  }

</style>
